Double gussets necessary?

Ruby

I plan on breastfeeding my baby and poop tends to be runny. I’m looking for a budget friendly cloth diaper pockets. We already have some covers and plan to do the jelly roll fold with prefolds. Now onto searching for pockets. I read a lot great things about Mama Koala and Alva diapers containing urine but nothing about runny poop. I saw they don’t have double gussets. So is double gussets a must to contain poop? Or do they have a trick to them?